Hybrid power system

Patent metadata

Field	Value
Publication number	US-9841009-B2
Application number	US-201514810642-A
Country	US
Kind code	B2
Filing date	Jul 28, 2015
Priority date	Jul 28, 2015
Publication date	Dec 12, 2017
Grant date	Dec 12, 2017

Abstract

Heat from a safe high energy density fuel, such as aluminum, is used to generate electrical power. In some applications, the fuel may use seawater as an oxidizer. Additionally, the hybrid power system uses a highly efficient and silent thermoacoustic power converter (TAPC) to convert the thermal energy from the oxidation of aluminum to AC electrical energy. The AC electrical energy is converted to DC energy and stored in a battery. In situations demanding low power, the battery can provide power while the fuel combustion process is suspended.

First claim

What is claimed is:

1. An apparatus, comprising:
an aluminum combustor; and
a thermoacoustic power converter thermally connected to the aluminum combustor, the thermoacoustic power converter generating electrical power from thermal energy received from the aluminum combustor using a first and a second flexible membrane, wherein the first and the second flexible membranes move in opposing directions.

2. The apparatus of claim 1 , further comprising an AC to DC converter that converts AC power from the thermoacoustic power converter to DC power.

3. The apparatus of claim 1 , further comprising a load balancer to equalize AC power produced by first and second outputs of the thermoacoustic power converter.

4. The apparatus of claim 3 , further comprising an AC to DC converter that converts AC power from the thermoacoustic power converter to DC power.

5. The apparatus of claim 1 , further comprising a distiller that provides water to the aluminum combustor.

6. The apparatus of claim 1 , further comprising a hydrogen capture system that receives hydrogen gas from the aluminum combustor.

7. The apparatus of claim 1 , further comprising a fuel cell that receives hydrogen gas from the aluminum combustor.

8. An apparatus, comprising:
a heat source;
a thermoacoustic power converter thermally connected to the heat source, the thermoacoustic power converter generating electrical power from thermal energy received from the heat source using a first alternator having a first flexible membrane and a second alternator having a second flexible membrane, wherein the first and the second flexible membranes move in opposing directions; and
an electrical energy storage device that stores electrical power obtained from the thermoacoustic power converter.

9. The apparatus of claim 8 , wherein the electrical energy storage device is a battery.

10. The apparatus of claim 8 , further comprising an electrical energy storage device monitor that monitors an amount of stored electrical energy and controls the thermal energy received by the thermoacoustic power converter based on the amount of stored electrical energy.

11. The apparatus of claim 8 , wherein the heat source is a solar energy collector.

12. The apparatus of claim 8 , wherein the heat source is a hydrocarbon combustor.

13. An apparatus, comprising:
an aluminum combustor;
a thermoacoustic power converter thermally connected to the aluminum combustor, the thermoacoustic power converter generating electrical power from thermal energy received from the aluminum combustor using a first and a second flexible membrane, wherein the first and the second flexible membranes move in opposing directions; and
a battery that stores electrical power obtained from the thermoacoustic power converter.

14. The apparatus of claim 13 , further comprising a load balancer to equalize AC power produced by first and second outputs of the thermoacoustic power converter.

15. The apparatus of claim 13 , further comprising a distiller that provides water to the aluminum combustor.

16. The apparatus of claim 13 , further comprising an electrical energy storage device monitor that monitors an amount of stored electrical energy in the battery and controls the thermal energy received by the thermoacoustic power converter based on the amount of stored electrical energy.

17. The apparatus of claim 13 , further comprising a hydrogen capture system that receives hydrogen gas from the aluminum combustor.

18. The apparatus of claim 13 , further comprising a fuel cell that receives hydrogen gas from the aluminum combustor.

19. The apparatus of claim 13 , wherein the battery is a lithium-ion battery.

20. The apparatus of claim 13 , wherein the battery is a zinc-air battery.

Assignees

• Northrop Grumman Systems Corp

Inventors

• Proudfoot Lewis S

Classifications

• F02G2243/00

  Stirling type engines having closed regenerative thermodynamic cycles with flow controlled by volume changes · CPC title

• F03G7/00 Primary

  Mechanical-power-producing mechanisms, not otherwise provided for or using energy sources not otherwise provided for · CPC title

• F25B2309/1404

  Pulse-tube cycles with loudspeaker driven acoustic driver · CPC title

• F01K3/188 Primary

  using heat from a specified chemical reaction · CPC title

• F25B9/14

  characterised by the cycle used, e.g. Stirling cycle · CPC title